Defensive publication



"7% o, 0 DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file oi. this application is available to the public for inspection; reproduction may be purchased for [30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofilce makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 18, 1969 603,791 CHEMICALLY MODIFIED CARBON BLACK AND RUBBERY COMPOSITIONS CONTAINING SAME Albert M. Gessler, 448 Orchard St., Cranford, NJ. 07016, and John Rehner, Jr., 200 Linden Ave., Westfield,N.J. 07090 Continuation-impart of application Ser. No. 359,454,

Apr. 13, 1964, which is a continuation of application Ser. No. 20,842, Apr. 8, 1960, which is a continuation-in-part of application Ser. No. 684,643, Sept. 18, 1957. This application Dec. 22, 1966. Published Mar. 18, 1969 Class 260-415 No Drawing. 47 Pages Specification Carbon blacks, whose surface areas have been increased at least 25% above normal values, when chemically modified through contact with a substance such as elemental halogen, sulfur-containing compounds, nitrogen-containing compounds, oxygen-containing compounds, halogencontaining compounds and mixtures thereof are highly desirable fillers for rubbery materials particularly synthetic rubbery materials such as butyl rubber. The preferred method of attrition is steel ball milling. 

